2019 澳洲 AMC B-UpperPrimary 真题 答案 详解

2019 年 B-UpperPrimary 真题,中英双语,答案,详解

中英双语真题

1. 201 - 9 =
   201 - 9 =
   (A) 111 (B) 182 (C) 188 (D) 192 (E) 198

2. A Runnyball team has 5 players. This graph shows the number of goals each player scored in a tournament. Who scored the second-highest number of goals?
   (A) Ali (B) Beth (C) Caz (D) Dan (E) Evan

3. Six million two hundred and three thousand and six would be written as
   (A) 62036 (B) 6 230 006 (C) 6 203 006 (D) 6 203 600 (E) 6 200 306

英文真题

Upper Primary Division
Questions 1 to 10, 3 marks each

1. (201 - 9 =)
   (A) 111
   (B) 182
   (C) 188
   (D) 192
   (E) 198

2. A Runnyball team has 5 players. This graph shows the number of goals each player scored in a tournament. Who scored the second-highest number of goals?
   (A) Ali
   (B) Beth
   (C) Caz
   (D) Dan
   (E) Evan

3. Six million two hundred and three thousand and six would be written as
   (A) 62036
   (B) 6 230 006
   (C) 6 203 006
   (D) 6 203 600
   (E) 6 200 306

4. These cards were dropped on the table, one at a time. In which order were they dropped?
   (A) 4♥ A♥ 5♥ 3♥ 2♥
   (B) A♥ 4♥ 5♥ 3♥ 2♥
   (C) 2♥ 4♥ A♥ 3♥ 5♥
   (D) A♥ 2♥ 3♥ 4♥ 5♥
   (E) 2♥ 3♥ 4♥ 5♥ A♥

真题文字详解(英文)

2019 AMC Upper Primary Solutions 1. (Also J1) 201 - 9 = 192, hence (D). 2. (Also MP5) From the top, Caz scored 8, then Evan scored 7, hence (E). 3. Adding millions, thousands and units, the number is 6000000 + 203000 + 6 = 6203006, hence (C). 4. (Also MP7) A♥ is under 4♥, 4♥ is under 5♥, 5♥ is under 3♥, and 3♥ is under 2♥. So the order of dropping is A♥ 4♥ 5♥ 3♥ 2♥, hence (B). 5. (Also MP9) From 1st Street to 4th Street, she walks 3 blocks east. From 1st Avenue to 3rd Avenue, she walks 2 blocks north, hence (D). 6. (Also MP10) In Jake's hand, there are (A) 3 hearts, (B) no diamonds, (C) 2 spades, (D) 2 picture cards, and (E) 1 even-numbered card. All 7 cards are equally likely, so (A) is the most likely, hence (A). 7. We look at each solid, checking first for 5 faces, then 9 edges. (A) has 6 faces; (B) has 8 faces; (C) has 5 faces, but only 8 edges; (D) has 5 faces and 9 edges; (E) has 4 faces; hence (D). 8. (Also J7) Halfway to Renmark is 230 ÷ 2 = 115 km. Blatchetown is 9km short of this, and Waikerie is 33 km beyond, so Blatchetown is closest to halfway, hence (D). 9. 25 - 8.25 = 16.75, hence (B). 10. There are 9 divisions for 42 - 24 = 18 on the scale, so each division is 2 units. So the number at P is 24 + 6 × 2 = 36, hence (D).